摘要： 在一般的嵌入式实时操作系统中，时钟中断服务程序在每个时钟节拍工作。在实际应用中，并不是每个时钟节拍都有任务调度，所以有很多时钟中断服务程序的工作是多余的，浪费了CPU资源。为了提高性能，文章提出了一种方法来改变这种情况。

关键词: 单调执行率调度, 占先式内核, 时钟节拍

Abstract: In most RTOS, the timer interrupt service routine(ISR) executes at every time tick. In most practical application, context switch doesn't happen at some time tick , so sometime the execution of timer ISR is useless and wastes CPU time. In this paper, a new method is proposed to prevent useless execution of the timer ISR.

中图分类号: 

• TP316.2